Esterification of Aldehydes and Alcohols with Pyridinium Hydrobromide Perbromide in Water
作者:Shinsei Sayama、Tetsuo Onami
DOI:10.1055/s-2004-835630
日期:——
The direct esterification of aldehydes and alcohols was carried out with pyridinium hydrobromide perbromide in water at room temperature. A variety of aldehydes were converted to respective ester derivatives with alcoholssuch as methanol, 1,2-ethanediol, 1,3-propanediol. Further, a variety of aliphatic alcohols were also converted to the corresponding Tishchenko-like dimeric esters in good yields under
Electrochemical esterification reaction of alkynes with diols <i>via</i> cleavage of carbon–carbon triple bonds without catalyst and oxidant
作者:Pei-Long Wang、Hui-Zhi Shen、Hui-Hui Cheng、Hui Gao、Pin-Hua Li
DOI:10.1039/d0gc02193h
日期:——
as it is catalyst-free, oxidant-free, and additive-free and shows atom-economy. This is the first example of an electrochemical reaction via cleavage of carbon–carbon triple bonds. Meanwhile, this is also the first example of a carbon–carbon triple bond cleavage reaction of alkynes with diols.
Highly Selective Methodology for the Direct Conversion of Aromatic Aldehydes to Glycol Monoesters
作者:Hashem Sharghi、Mona Hosseini Sarvari
DOI:10.1021/jo020724o
日期:2003.5.1
Al(2)O(3)/MeSO(3)H (AMA) was found to be an extremely efficient reagent for the conversion of aromatic aldehydes and diols to glycol monoesters. The remarkable selectivity achieved with this reagent is an attractive feature of the present method.
Process for producing organic compound epoxy resin composition, cured article obtained from the epoxy resin, and semiconductor device obtained with epoxy resin
申请人:——
公开号:US20040260039A1
公开(公告)日:2004-12-23
There are disclosed a process for producing an organic compound in the presence of a particular substituted triarylphosphine compound, particularly, a process for producing an oxyalkylene derivative at a high yield using the above compound which is very active and easy to handle, by reacting an organic epoxy compound with a carboxylic acid ester, a carboxylic acid anhydride, a sulfonic acid ester or a carbonic acid ester, and an epoxy resin composition using a particular substituted triarylphosphine compound as a curing accelerator, a cured material of the composition and a semiconductor device using the composition.
IMIDAZOPYRIDINE DERIVATIVES, PROCESS FOR PREPARATION THEREOF AND THERAPEUTIC USE THEREOF
申请人:Alcouffe Chantal
公开号:US20130116250A1
公开(公告)日:2013-05-09
The invention relates to compounds corresponding to formula (I):
in which
R
2
and R
3
together form, with the carbon atoms of the phenyl nucleus to which they are attached, a 6-membered nitrogenous heterocycle corresponding to one of formula (A), (B) or (C) below:
in which the wavy lines represent the phenyl nucleus to which R
2
and R
3
are attached.
Preparation process and therapeutic use.